gcal_list_freebusy

A read tool on the Integrations MCP server.

SERVERIntegrations MCP SOURCEshriram-vasudevan/integrations-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/shriram-vasudevan-integrations-mcp/gcal-list-freebusy.md

WHAT IT DOES

What gcal_list_freebusy does on Integrations MCP

AI agents call gcal_list_freebusy to retrieve information from Integrations MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why gcal_list_freebusy is rated Low

This tool retrieves calendar availability data without modifying it. While it is a Read operation (no side effects), it accesses potentially sensitive personal scheduling information. Severity is medium because exposure of freebusy data could reveal sensitive timing patterns about user availability and activities, though it typically only returns free/busy blocks rather than event details.

From the tool's definition Tool name 'gcal_list_freebusy' indicates it retrieves free/busy status from Google Calendar. The 'list' prefix and absence of write/delete operations suggest read-only query functionality.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs gcal_list_freebusy safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Integrations MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For gcal_list_freebusy, this is the rule to start with:

gcal_list_freebusy Allowed

gcal_list_freebusy is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "gcal_list_freebusy": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Integrations MCP, apply this rule, and every gcal_list_freebusy call is checked against it from then on.

FAQ

Questions about gcal_list_freebusy

What does the gcal_list_freebusy tool do? +

gcal_list_freebusy is a read tool on the Integrations MCP server. It is categorised as a Read tool in the Integrations MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on gcal_list_freebusy? +

Register the Integrations MCP server in PolicyLayer and add a rule for gcal_list_freebusy: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Integrations MCP. Nothing to install.

What risk level is gcal_list_freebusy? +

gcal_list_freebusy is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit gcal_list_freebusy? +

Yes. Add a rate_limit block to the gcal_list_freebusy rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.

How do I block gcal_list_freebusy completely? +

Set action: deny in the PolicyLayer policy for gcal_list_freebusy. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.

What MCP server provides gcal_list_freebusy? +

gcal_list_freebusy is provided by the Integrations MCP server (shriram-vasudevan/integrations-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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